Seal authenticity identification method capable of eliminating receipt interference

A technology of authenticity identification and seal, which is applied in the field of authenticity identification of seals, which can solve the problems of automatic identification interference, prone to false detection and missed detection, etc.

Inactive Publication Date: 2010-11-24
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for identifying the authenticity of seals that can eliminate the interference of bottom slips, which solves the problem that the words and form lines on the bottom slips in the prior art cause relatively large interference for its automatic recognition, resulting in easy false detection Problems with missed detection

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  • Seal authenticity identification method capable of eliminating receipt interference
  • Seal authenticity identification method capable of eliminating receipt interference
  • Seal authenticity identification method capable of eliminating receipt interference

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Embodiment Construction

[0051] The present invention will be described in detail below in combination with specific embodiments.

[0052] Method of the present invention, concrete implementation according to the following steps:

[0053] Step 1, preprocessing of seal image

[0054] Assuming that the color of the stamped ink pad is red, the general bill is mainly divided into the background of the paper, the red seal area, and the printed words, form lines, and handwritten signatures on the bill. The purpose of preprocessing is to preserve the imprint area and eliminate the background and various interference effects.

[0055] Assume that the red, green, and blue color channel values ​​of the input seal ticket image with a size of m×n are [R(x, y)] respectively m×n , [G(x,y)] m×n , [B(x,y)] m×n , whose gray value is [F(x,y)] m×n :

[0056] F (x, y) = 0.299 R (x, y) + 0.587 G (x, y) + 0.114 B (x, y), x = 1, 2, ..., m, y = 1, 2,...,n (1)

[0057] For the grayscaled stamp image [F(x, y)] m×n Usi...

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Abstract

The invention discloses a seal authenticity identification method capable of eliminating receipt interference, which comprises the following specific steps of: preprocessing a seal image; repairing a preprocessing result image; registering the seal image and a prestored standard seal image; performing expansion; filtering the image from which the receipt interference is eliminated; corroding the registered standard seal image at one time; eliminating the residual interference further; performing coarse discrimination on the authenticity of the seal image; and performing fine discrimination on the authenticity of the seal image. The authenticity identification method is suitable for bill seals under the actual stamped condition; the link of preprocessing the seal image mainly comprises that the interference such as receipt tables, characters and the like of bills which are superposed on the seal is eliminated, and the preprocessing link is completed by adopting steps of color extracting, the repair of signature superposition defect of the seal, the removal of local interference through filtering and the like; and in the identification of the authenticity of the seal image, an authenticity identification result is obtained according to the distribution character of a residual error ratio in a mode of defining left deviation and right deviation.

Description

technical field [0001] The invention belongs to the technical field of pattern recognition, and relates to a method for identifying authenticity and falsehood of seals that can eliminate the interference of back slips. Background technique [0002] Seals are widely used as evidence to maintain the legal validity of bills. The identification of counterfeit seals is one of the effective means to prevent economic crimes. In most cases, the verification of whether a bill is valid is only based on stamped bills, and it is impossible to carry a seal. Ontology, therefore, the automatic auxiliary identification system of seal authenticity based on image detection technology is the most convenient and practical mode. Considering that the stamping conditions of bills are relatively complicated, it is easy to have differences in the stamping strength and the amount of ink pad, and the text and form lines on the back sheet also cause relatively large interference to its automatic recogn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06K9/36G06T7/00G06T5/00
Inventor 朱虹王翔邓颖娜王栋邢楠
Owner XIAN UNIV OF TECH
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